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shutvik [7]
3 years ago
11

When mammals develop in the womb it is called the _____

Biology
1 answer:
maria [59]3 years ago
8 0

Answer:

embryo

Explanation:

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The large number of alveoli in lungs improve diffusion by ____.
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When the air is inhaled through the nostrils, the air containing the oxygen the air diffuses inside the alveoli. The alveoli are the tiny sacs where air enters and exchange of gases takes place. From the alveoli the oxygen enters into the blood stream. The oxygen is utilized by the cells for respiration. The increase in network and number of the alveoli will increase the surface area for the diffusion of oxygen and hence, will speed up the respiration process.

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If a population grows by 3 percent each year, the growth of the population is
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Transcription begins at a promoter. What is a promoter? a. A site in DNA that recruits the RNA Polymeraseb. Part of the RNA mole
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The correct answer is: a. A site in DNA that recruits the RNA Polymerase

Promoters are regions of DNA molecule located near the transcription start codons of genes, usually upstream on the DNA with the function to initiate DNA transcription. Promoters contain specific DNA sequences (e.g. TATA boxes) that are binding sites for the enzyme RNA polymerase and transcription factors that recruit RNA polymerase. Transcription factors can regulate gene expression and act as activators or repressors depending on sequences that attach to specific promoters.

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